The GamePad for Nintendo's upcoming console includes near-field communication functionality, but studio head Paul Reiche believes the portal will remain a "fundamental" part of the franchise.
"The problem is, if you look at the NFC, it's in the GamePad, which is really convenient if you want to do the traditional 'swipe your card', but trying to set a toy on there, it slides off," he said.
"At first, we looked at the NFC feature before we got the hardware specs and we were, like, 'Uh-oh, now everybody can do this'.
"Then we saw the Raving Rabbids and the video that showed them putting the toy on the GamePad."
Reiche added: "Unfortunately, [Ubisoft] dropped that feature, and I think for potentially the same reasons, which is - for an ongoing game mechanic, it didn't seem well-suited, as you are holding the GamePad."